#include <chrono>
#include <functional>
#include <memory>
#include <string>

#include "rclcpp/rclcpp.hpp"
#include "std_msgs/msg/string.hpp"

using namespace std::chrono_literals;


class DataPreProcessNode : public rclcpp::Node
{
public:
  DataPreProcessNode();


private:
  void timer_callback();

  rclcpp::Publisher<std_msgs::msg::String>::SharedPtr publisher_;
  rclcpp::TimerBase::SharedPtr timer_;
  size_t count_;
};




